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is that a thunder jet or similar mounted in the opening of the carb(the black hex thing)? i just drilled the main out to a 112 and it still looked lean on the plug. the bike used to idle good with the 44mm but had no throtl responce. i know with the large intake throttle responce will never be great down low but bike responds good above 4500. i will check my intermediate jet tmro. so whats with your air bleed is this something mine will need or is it just easier to tune now that its external.